The earth is not as round as your world globe makes it appear. It's actually a bit potato-shaped, which, along with other anomalies, affects how gravity is measured in different parts of the world. A German company that makes precision scales is experimenting with gravity by sending a garden gnome to various places around the world to be weighed. You can sign up as a volunteer to weigh the gnome in your area, or follow the gnome's travels and weights. Sure, it's viral marketing, but it could be fun, too! Link -via the Presurfer